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Microsoft Surface is a great piece of hardware that has a beautiful 2-in-1 form factor, great performance, and the most cutting-edge technologies. When it comes to storage option you will be limited to choose from some preset configurations that sometimes don’t fit your needs. Fortunately, most Microsoft Surface models except the Surface Laptop are all come with an SD or MicroSDXC card slot that you can use to expand your device’s storage.

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  2. Extreme Pro SDXC & SDHC UHS-II Capacities: 64GB, 32GB, 16GB Read/write speeds: 280MB/s / 250MB/s Speed rating: UHS Speed Class 3 more product info ». Extreme Pro SDXC & SDHC UHS-I.
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A regular SD card has limited storage capacity, while the SDHC card and the SDXC card feature more storage and can support faster data transfer rates. SDHC Short for Secure Digital High Capacity, SDHC is a type of flash memory card based on the SDA (SD Association) 2.00 specification which enables SD cards to reach a higher capacity up to 32GB. UHS-I (Ultra High Speed Phase I) compatible Transfer speed 60 - 95 MB/sec (the higher the transfer speed, the better gameplay experience on Nintendo Switch) What information can be saved to a microSD card on Nintendo Switch?

Samsung (MB-ME256GA/AM) 256GB 100MB/s (U3) MicroSDXC EVO Select Memory Card with Full-Size Adapter
MicroSDXC Class 10 UHS-I U3 with 4K UHD video recording
SanDisk 200GB Ultra microSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-200G-GN6MA
MicroSDXC Class 10 UHS-I U1 A1 with FullHD video recording
Lexar Professional 1000x 256GB microSDXC UHS-II Card (LSDMI256CBNA1000A)
MicroSDXC Class 10 UHS-II U3 with 3D & 4K video recording

MicroSD card buying guide

There are several things to consider when you’re choosing a MicroSD card for your device. MicroSD card’s capacity, speed, type, and price are the most important things you need to know about when it comes down to the final decision.

1Speed Class

According to the SD Association, here we have an overview of memory’s sequential write speed information for different speed classes of MicroSD cards.

Minimum Write SpeedSpeed ClassUHS SpeedVideo SpeedMax Video Recording Quality
2MB/secClass 2SD Video
4MB/secClass 4SD Video
6MB/secClass 6V6SD Video
10MB/secClass 10U1V10SD Video
30MB/secU3V30Full HD Video
60MB/secV604K Video
90MB/secV908K Video

*UHS = Ultra High-Speed

2App Performance Class

There is also another standard that is being used for application performance classification. This standard will show you the random read and write performance as input/outputs per second (IOPS).

Application Performance ClassMin. Random ReadMin. Random WriteMin. Sustained Seq. Write
Class 1 (A1)1500 IOPS500 IOPS10 MBytes/s
Class 2 (A2)4000 IOPS2000 IOPS10 MBytes/s

3Capacity Standard

You might want to know as well about what is the maximum MicroSD card’s capacity that your Surface can support. Here is the SD card capacity standard.

SD Slot StandardCompatible SD CardsMemory Capacity
SDSDUp to 2 GB
SDHC (High Capacity)SDHC, SD2GB to 32GB
SDXC (Extended Capacity)SDXC, SDHC, SD32GB to 2TB

Since all Microsoft Surface devices are using MicroSDXC host controllers, so your Surface technically can support MicroSD card with capacity up to 2TB. Learn more about Microsoft Surface specifications by downloading the Microsoft Surface RT User Guide.

Now you have a better understanding of MicroSD Card’s speed and capacity standard. Here, we have round up the best MicroSD cards that are compatible and work well on Microsoft Surface.

Our Picks: Best MicroSD Cards for Microsoft Surface

To learn more about individual Micro SD card, here we have listed the specifications and our thought on each item here:

1. SanDisk 200GB Ultra microSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-200G-GN6MA
$24.99
2. Samsung (MB-ME128GA/AM) 128GB 100MB/s (U3) MicroSDXC EVO Select Memory Card with Full-Size Adapter
$16.77
3. Lexar Professional 1000x 128GB microSDXC UHS-II Card w/ Adapter, Up To 150MB/s Read (LSDMI128CBNA1000A)
$59.17
4. BASEQI Aluminum MicroSD Adapter for Microsoft Surface Book, Surface Book 2, Surface Book 3 13.5' (Model-350A)
$24.99

1 Sandisk Ultra Micro SDXC UHS-I Card

  • Available from 8GB to 400GB.
  • Class 10 / UHS-I, speed up to 100 MB/s.
  • Load apps faster with A1 app performance class
  • Waterproof, temperature proof, shockproof, and X-ray proof.
  • Included SD adapter.
  • 10-year limited warranty

If you want fairly big storage for your Surface, you can get this 200GB MicroSDXC card at an affordable price while it is on sale. The Sandisk MicroSDXC UHS-I card features a class 10 speed rating.

It can support faster data transfer speed up to 100MB/s which is great for playing large videos. As the rated as A1 App Performance, it is able to run most apps and games without any slow down. This Sandisk MicroSDXC also has great protection with waterproof, temperature proof, shockproof, X-ray proof and magnet proof.

2 Samsung EVO UHS-3 Class 10 MicroSD Card

$24.99
  • Available from 32GB to 256GB.
  • Class 10 / UHS 3, 100MB/s read and 90MB/s write speed.
  • 4-proof protection from water, extreme temperatures, and other harsh conditions.
  • Included SD adapter.
  • 10-year limited warranty

The next one is from Samsung, The EVO UHS-3 card also rated as a class 10 and UHS-3 transfer speed. It can transfer up to 100MB/s and 90MB/s read and write speeds respectively. It is also able to record the 4K UHD video recording and handle most apps and games without any problems. It does come with a MicroSD card adapter so you can use it in any computers with a full-size SD card slot.

3 Lexar Professional 1000x microSDXC UHS-II/U3

  • Using high-speed UHS-II (U3) technology.
  • Transfer speed up to 150MB/s.
  • Verified to be compatible with GoPro cameras.
  • Can read can capture 4K UHD and 3D video.
  • Included a MicroSD UHS-II reader for the best possible transfer speed.

If you need the fastest expansion storage on your Microsoft surface devices, you can count on this Lexar Professional 1000x. It using the latest UHS-II/U3 technology that can deliver the fastest transfer speed up to 150MB/s.

It will let you work on big documents or projects file that needs the high speed of both input and output. It’s verified to work great with GoPro cameras for capturing 4K UHD videos.

4 BASEQI Aluminum MicroSD Adapter for Surface Book

$29.99
View on Amazon
  • Designed for Surface Book.
  • Made from aluminum material.
  • Easy to insert/remove.
  • Supports UHS-I.
  • Model 350A for 13.5″ Surface Book and Surface Book 2.
  • Model 351A for 15″ Surface Book 2

If you are looking to expand the storage of your Surface Book and Surface Book 2, the only thing you can do is using the SD card slot. Since it is a full-sized SD card slot, you will need a full-sized SD card or SD card adapter. However the depth of the slot is about half-length of the card, so it’s not a good idea to use the full-sized SD card as a permanent solution to expand the storage.

Fortunately, there is a MicroSD Adapter made by BASEQI that is firm and nicely fit the Microsoft Surface Book card slot without sticking out. With that said, you can now use any microSD card to expand the storage on your Surface Book. It has the same color and aluminum designed just like the Surface Book’s chassis.

Conclusion

Those are the best MicroSD cards in terms of capacity, speed, and price. If you want the most affordable large MicroSD card, we recommend the Sandisk Ultra 200GB Micro SDXC UHS-I card or Samsung 128GB EVO UHS-3 MicroSD card. If the speed matter you the most the Lexar Professional microSDXC are what you should consider. Finally, if you have Microsoft Surface Book you will need additional special MicroSD adapter made specifically for Surface Book.

There are three main types in the SD memory card family. SD, SD High Capacity (SDHC™), and SD Extended Capacity (SDXC™). This article details the different specifications of all three types of SD memory cards and the speed class ratings and compatibilities that are different with each type.


Additional Reference: SD Assocation Consumer Information


SD capacities range from 128MB to 2GB
Default Format: FAT16
SD cards will work in all host devices that support SD, SDHC, or SDXC


SD High Capacity (SDHC™) card is an SD™ memory card based on the SDA 2.0 specification.
SDHC capacities range from 4GB to 32GB
Default Format: FAT32
Because SDHC works differently than standard SD cards, this format is NOT backwards compatible with host devices that only take SD (128MB - 2GB) cards. Most readers and host devices built after 2008 should be SDHC compatible.
To ensure compatibility, look for the SDHC logo on cards and host devices (cameras, camcorders, etc.)


SD Extended Capacity (SDXC™) card is an SD™ memory card based on the SDA 3.0 specification.
SDXC capacities range from 64GB to 2TB
Default Format: exFAT
Because SDXC uses a different file system called exFAT and it works differently than standard SD cards, this format is NOT backwards compatible with host devices that only take SD (128MB to 2GB) or host devices that only take SDHC (4GB to 32GB). Most host devices built after 2010 should be SDXC compatible.

To ensure compatibility, look for the SDXC logo on cards and host devices (cameras, camcorders, etc.).

NOTE: Internal card readers on laptops up to year 2008 may NOT support SDXC cards. SDXC cards will work in SDHC compatible readers (not SD readers) if the computer OS supports exFAT.
For more information on exFat see: Operating Systems that support the exFAT File System



Ultra High Speed, Phase I (UHS-I) bus design for SDHC and SDXC cards was added in SD spec 3.0. This is a design enhancement to increase the performance of SDHC/SDXC cards.
UHS-I specification defines two bus architecture options for up to 50MB/s (UHS-50) and 104MB/s (UHS-104) data transfer rates. These are theoretical maximum limits and actual maximum performance for a specific card is defined on it label or in advertising.
UHS is an enhancement to the original SD interface specifications. Host devices will obtain the UHS maximum speed when both the card and host device support UHS. Otherwise, the host device and card will use the slower SD maximum speed obtainable.
There is no compatibility problem using a UHS card with a non-UHS device.


Ultra High Speed Phase II (UHS-II) bus design for SDHC and SDXC was added in SD spec 4.0. This is an additional design enhacement with connector interface modifications to increase performance.

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UHS-II specification defines bus architecture for options of 156MB/s and 312MB/s. Manufacturers implemented the 312MB/s option in memory cards. These are theoretical maximum limits and actual maximum performance for a specific card is defined on the label or in advertising.

Host devices will obtain the maximum UHS-II speed when both the card and the host device support UHS-II. Otherwise, the host device and card will use the highest compatible UHS-I or SD bus speed.

There is no compatibility problem using a USH-II card in a UHS-I or non-UHS device.


Speed Class & UHS Speed Class Rating
Speed class ratings define a minimum guaranteed speed of SDHC/SDXC cards. Speed class rating is important for HD video mode or camcorders, where the device is actually saving a steady stream of data. The resolution and format of the video determines the amount of steady stream data. You should consult your camera user manual for minimum speed class requirements for HD video modes.

Speed Class (SD Bus)

Class

Minimum Speed

2

2MB/s

4

4MB/s

6

6MB/s

8

8MB/s

10

10MB/s

Uhs-i

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UHS Speed Class (UHS Bus)

UHS Class

Minimum Speed

1

10MB/s

3

30MB/s

Sdxc Slot With Uhs-i Support -


For a more detailed explanation of speed class see: Difference between Speed Class, UHS Speed Class, and Speed Ratings...
SD Association: Speed Choices


Compatibility Summary
The chart below shows the host device and the memory cards supported.

Host device
(ex. cameras, video recorders, phones, readers, etc.)
Memory cards supported

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SDXC cards and host devices
- SDXC memory cards can ONLY be used with SDXC host devices.
- SDXC memory cards will NOT work with SD / SDHC host devices.
Additional info on SDXC cards and host devices
- SDXC host devices can use and support SD, SDHC and SDXC memory cards.
- SDHC host devices can use and support both SD and SDHC memory cards.
- SDHC memory cards can be used with SDHC and SDXC host devices.